Source : Webster's Revised Unabridged Dictionary (1913)

Turbo \Tur"bo\, n. [L. turbo, -inis, a top. See {Turbine}.]
   (Zo["o]l.)
   Any one of numerous marine gastropods of the genus {Turbo} or
   family {Turbinid[ae]}, usually having a turbinate shell,
   pearly on the inside, and a calcareous operculum.